tom at redpepperracing
Feb 17, 2008, 8:38 AM
Post #4 of 4
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Yeechang Lee wrote:
> Tom Lichti <tom[at]redpepperracing.com> says:
>
>> I've seen that there have been some updates to trunk to allow
>> multi-threaded decoding of streams, and in the video profiles screen
>> there is a new 'max cpus' setting. However, that setting doesn't
>> seem to be doing anything, or even being saved, I can't find any
>> evidence in the settings table that it is stored there, and if I
>> change it to '2', when I play a stream it says 'Using 1 CPUs for
>> decoding', and then I go back into the video profile and it is set
>> to 1 again.
>>
>
> I noticed the same thing. It seems that the individual entries in a
> playback profile only save the Max CPUs setting when created;
> subsequent edits don't change the number. Try deleting, then
> recreating, an entry.
>
I didn't delete them, but you pointed me in the right direction. For
some reason I had it stuck in my head to look in the settings table,
when really it's in the displayprofile table. I updated that to '2',
we'll see if it makes a difference.
>
>> Also, does it only work for h264 encoded streams, or will it help
>> with MPEG2 as well?
>>
>> I only ask because I am seeing more CPU usage on playback now than I
>> was a few weeks ago.
>>
>
> Sounds like what I noticed with my single-core Pentium 4 frontend. I
> thought that, since the CPU is Hyperthreaded and thus emulates two
> physical cores, bumping the Max CPUs number up to 2 would be a good
> thing. Not so; CPU usage for mythfrontend running 1080i Bob playback
> went from 50-70% to 100%+. So back to 1 I go.
>
I have a true dual core CPU, so it should help.
Tom
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